Pipe clamp



July 1, 1924. 1,499,828;

- A. KINSEY PIPE cum? ,Mmm

Mmm;

Patented July 1, 1924.

UNITED STATES PATENT OFFICE.

AL. KINSEY, F LONGFELLOW, TEXAS, ASSIGNOR OF ONE-HALF. TO 0. E. SGHUPBACH, 0F SANDERSON', "TEXAS PIPE CLAMP.:

Application filed January 31, 1923; Serial No. $16,223:

T 0 all fr0/"10m t may concern.'

Be it known that l, AL. Kmsn, a citizen of the United States, residing at Longfellow, in the county of Pecos and State of 51T`exas, have invented certain new andl useful Improvements in Pipe Clamps, or" which the following is ay specilication.

The present invention relates tov pipe clamps especially adapted: for use in installinO' pipes in wells.

bjects of thev invention are to provide means normally capacitating as a guide to effect accurate positioning of the pipe in the welll; to eliminate possibility of the pipe slipping while being deposited in the well cavity; and to provide means which adapts itself to the size of the pipe in order to grip and retain the latter, suitable means being provided to release the pipe and per-- mit tree movement thereof when desired.

The above and other objects of this invention will be apparent from the following description of the present preferred i'orm of the invention taken in connection with the accompanying drawings wherein Fig. 1 is a top plan view of a pipe clamp constructed in accordance with this invention illustrating its application;

Fig. 2 is a vertical sectional view of the 30 same; and

Fig. 3 is a side elevational view thereof. The device vof this invention consists of a frame or body 4 the lower end 5 of which is ilared outwardly and thickened to provide a substantial supporting base. The frame is made of metal and is provided with a plurality of recesses 6 each of which has a dog 7 pivotally mounted therein. The. inner face of each dog is equipped at its upper end with a series of teeth or serrations 8 which are adapted to bite into a pipel 9 mounted concentrically in the frame 4. The lower inner face 10 of each dog 7 is of an arcuate. configuration whereby when the. upper ends of the dogs are retracted into the recesses 6, the lower inner faces of the dogs will clear the outer periphery of the pipe 9 to permit free movement of the latter. As shown in Fig. 2, the dogs are pivoted approximately midway their ends and in close proximity to the outer margins thereof.

The outer margin of each dog, above the axis of the latter, is engaged. by the inner end of a spring 11, the outer end of the spring being engaged with the inner periphery of the frame 4'. The spring may be of any desired. type and may be associatedl with the frame and dog in any desired manner provided that suiiicient force will be exerted upon the upper end or' thevdog Vto normally torce said upper end inwardly for normal engagement with the pipe or other object which may be suspended centrally in the frame 4. Thelower end of each dog is pivotally engaged with one end of a linlr 12, each link being of arcuate configuration and. being movable through an elongated slotk13 vformed' in the base 5 of the frame. The upper end of each of the links 12 is pivotally engaged with the lower tacey of an annulus 14. As shown in Figs. 2 and.` 3. the annulus 14 is, held in a plane above they upper terminal of the frame. 4 and .the diameter of the inner periphery thereof is in excess of the periphery of the frame 4 so that said annulus may be depressed downwardly into a position surrounding the frame. Vhen the annulus 14 is pressed downwardly the lower ends of the dogs 7 will be urged inwardly which correspondingly urges the upper ends of the dogs outwardly to release the pipes9 or other object gripped by the dogs.

In order to force the annulus 14 downwardly, a presser member 15 is provided consisting of two bars, portions of which are of semi-circular conguration. These bars are pivotally connected at one end to a stationary upstanding post 16 formed on the base 5 while the opposite ends thereof are extended laterall to provide a foot engaging portion 17. 'he bars are provided at diametrically opposite points with depending links 18 the lower end of each of which is in pivotal connection with a foot 19 which impinges the upper face of the annulus 14.

The upper end of the post 16 is in a plane above the top of the lannulus 14 to permit ample leverage of the presser member 15 when the latter is urged downwardly by a bearing upon the foot engaging terminal 17, or otherwise. It is apparent that pressure upon the foot engaging portion 17 of the presser member 15 will urge the feet 19 into engagement with the annulus 14 for a. purpose heretofor described. If desired the presser member 15 may be thrown back on the post 16 into the position shown by dotted lines in Fig. 3 and pressure exerted upon the annulus 14 by other means.

Itis of course to be understood that various changes may be made in this device especially inthe construction of the base member and the means employed for releasing the pipe gripping dogs. It is of importance in the present invention, however, that means be provided which have a normal tendency to move inwardly and grip the pipe so that slippage of the pipe will be positively eliminated at the same time providing simple and incumbersome means which will in no way retard the usual methods now employed for depositing` pipes in a well.

Vhat is claimed is l. A pipe clamp including a frame equipped with dogs normally engaging a pipe passing through the frame, an annulus operatively connected to said dogs to release the latter when the annulus is depressed, and means carried by said frame spring, said springs and means having connection with the dogs on opposite sides of their pivots, and depressible means to which said means is connected whereby the dogs will be simultaneously operated.

f5. A gripping apparatus of the class described including a frame, dogs pivotally mounted on said frame, means to urge projection of said dogs, arms operable to retract said dogs, a depressible member, said arms being pivoted to said depressible member, a lever movable against said member, and means rising from said plate to pivotally mount said lever.

4. A gripping apparatus of the class described including a frame provided with an opening to receive an article to be gripped, said frame having slots, dogs movable in said Slots, rods pivotally mounting said dogs, springs engaging said dogs and walls of the slots to normally project the dogs, arms extending into said slots, pins pivotally connecting the arms to said dogs, a

band, said arms being pivoted to said band,

a lever, means rising from said frame pivotally mounting said lever, a pressure shoe engageable with said band,and means pivoting said shoe on said lever.

AL. KINSEY. 

